P. Linko and L. Sogn. Copyright 1960 by the American Association of Cereal Chemists, Inc.
Glutamic acid decarboxylase activity of 25 commercial wheat samples was highly correlated with percentage of germ-damaged or "sick" wheat (r = -0.878***), germination percentage (r = +0.921***), topographical tetrazolium test (r = +0.912***), fat acidity (r = -0.864***), and fluorescence (r = -0.637***). The correlation involving germ damage is significantly higher (at 5% level) than that involving fluorescence. With 19 samples of new crop wheats of little germ damage and high germination percentage, the correlation between glutamic acid decarboxylase activity and viability was insignificant (r = +0.185ns), largely owing to differences in decarboxylase activity of wheats from various locations and of different variety. It was concluded that though glutamic acid decarboxylase activity seemed to have little value in examining new crop wheats of high viability, either alone or together with other tests it may give a good picture of the storage background of wheat.